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Molecular Plant 2024年第4期17卷 676-676页

作者： Justyna Jadwiga Olas Federico Apelt Maria Grazia Annunziata Sheeba John Sarah Isabel Richard Saurabh Gupta Friedrich Kragler Salma Balazadeh bernd mueller-roeber 不详

(Molecular Plant 14,1508-1524,September 62021)After the original publication of the above article,attentive readers identified errors in Figure 4H that needed correction as *** 4H contained the erroneous labels“10 DAP(7 DAT),”which should have each read,“7 DAP(4 DAT).”To avoid any confusion and ensure consistency across our figures,we modified some of the Col-0 images in a corrected version of Figure 4H below to resemble the exact same Col-0 images as in Figure *** details of the changes are as follows:rotation(Col-0 Primed,all timepoints;Col-0 Triggered,3 DAP and 5 DAP;Col-0 Primed/triggered,3 DAP and 5 DAP),replacement(Col-0 Triggered,7 DAP),and different cropping(Col-0 Primed/triggered,7 DAP).

关键词： Figure metabolism Prime

The HB40-JUB1 transcriptional regulatory network controls gibberellin homeostasis in Arabidopsis

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Molecular Plant 2022年第2期15卷 322-339页

作者： Shuchao Dong Danuse Tarkowska Mastoureh Sedaghatmehr Maryna Welsch Saurabh Gupta bernd mueller-roeber Salma Balazadeh Max-Planck Institute of Molecular Plant Physiology Am Mühlenberg 114476 Potsdam-GolmGermany Institute of Biology Leiden UniversitySylviusweg 722333 BE LeidenThe Netherlands Laboratory of Growth Regulators Czech Academy of SciencesInstitute of Experimental Botany&Palacky UniversityŠlechtitelû2778371 OlomoucCzech Republic University of Potsdam Institute of Biochemistry and BiologyKarl-Liebknecht-Stra?e 24-25Haus 2014476 Potsdam-GolmGermany

The gibberellins(GAs)are phytohormones that play fundamental roles in almost every aspect of plant growth and *** GA biosynthetic and signaling pathways are well understood,the mechanisms that control GA homeostasis remain largely unclear in ***,we demonstrate that the homeobox transcription factor(TF)HB40 of the HD-Zip family regulates GA content at two additive con-trol levels in Arabidopsis *** show that HB40 expression is induced by GA and in turn reduces the levels of endogenous bioactive GAs by simultaneously reducing GA biosynthesis and increasing GA ***,HB40 overexpression leads to typical GA-deficiency traits,such as small rosettes,reduced plant height,delayed flowering,and male *** contrast,a loss-of-function hb40 mutation enhances GA-controlled ***-wide RNA sequencing combined with molecular-genetic ana-lyses revealed that HB40 directly activates the transcription of JUNGBRUNNEN1(JJUB1),a key TF that re-presses growth by suppressing GA biosynthesis and ***40 also activates genes encoding GA 2-oxidases(GA2oxs),which are major GA-catabolic *** effect of HB40 on plant growth is ultimately mediated through the induction of nuclear growth-repressing DELLA ***,our results reveal the important role of the HB40-JUB1 regulatory network in controlling GA homeostasis during plant growth.

关键词： Arabidopsis growth gibberellin homeostasis transcription factor HB40 JUB1 GA 2-oxidase DELLA proteins

The central role of stem cells in determining plant longevity variation

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Plant Communications 2023年第5期4卷 97-111页

作者： Omid Karami bernd mueller-roeber Arezoo Rahimi Plant Developmental Genetics Institute of Biology LeidenLeiden UniversitySylviusweg 722333 BE Leidenthe Netherlands University of Potsdam Institute of Biochemistry and BiologyKarl-Liebknecht-Straße 24–25Haus 2014476 PotsdamGermany Present address:Huygens-Kamerlingh Onnes Laboratory Leiden UniversityNiels Bohrweg 22333 CA Leidenthe Netherlands

Vascular plants display a huge variety of longevity patterns,from a few weeks for several annual species up to thousands of years for some perennial *** how longevity variation is structured has long been considered a fundamental aspect of the life sciences in view of evolution,species distribution,and adaptation to diverse *** animals,whose organs are typically formed during embryogenesis,vascular plants manage to extend their life by continuously producing new tissues and organs in apical and lateral directions via proliferation of stem cells located within specialized tissues called *** cells are the main source of plant *** in plant longevity is highly dependent on the activity and fate identity of stem *** developmental factors determine how stem cells contribute to variation in plant *** this review,we provide an overview of the genetic mechanisms,hormonal signaling,and environmental factors involved in controlling plant longevity through long-term maintenance of stem cell fate identity.

关键词： stem cells plant longevity annual plants perennial plants axillary meristems

The plant circadian clock regulates autophagy rhythm through transcription factor LUX ARRHYTHMO

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Journal of Integrative Plant Biology 2022年第11期64卷 2135-2149页

作者： Ming-Kang Yang Xiao-Jie Zhu Chu-Min Chen Xu Guo Shu-Xuan Xu Ya-Rou Xu Shen-Xiu Du Shi Xiao bernd mueller-roeber Wei Huang Liang Chen State Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources College of Life SciencesSouth China Agricultural UniversityGuangzhou 510642China Guangdong Laboratory for Lingnan Modern Agriculture Guangzhou 510642China Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms South China Agricultural UniversityGuangzhou 510642China State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources School of Life SciencesSun Yat‐Sen UniversityGuangzhou 510275China Department of Molecular Biology Institute of Biochemistry and BiologyUniversity of Potsdam14476 Potsdam‐GolmGermany Max Planck Institute of Molecular Plant Physiology 14476 Potsdam‐GolmGermany

Autophagy is an evolutionarily conserved degradation pathway in eukaryotes;it plays a critical role in nutritional stress *** circadian clock is an endogenous timekeeping system that generates biological rhythms to adapt to daily changes in the *** evidence indicates that the circadian clock and autophagy are intimately interwoven in ***,the role of the circadian clock in regulating autophagy has been poorly elucidated in ***,we show that autophagy exhibits a robust circadian rhythm in both light/dark cycle(LD)and in constant light(LL)in ***,autophagy rhythm showed a different pattem with a phase-advance shift and a lower amplitude in LL compared to ***,mutation of the transcription factor LUX ARRHYTHMO(LUX)removed autophagy rhythm in LL and led to an enhanced amplitude in *** represses expression of the core autophagy genes ATG2,ATG8 a,and ATG11 by directly binding to their *** analysis revealed that LUX is responsible for improved resistance of plants to carbon starvation,which is dependent on moderate autophagy *** transcriptomic analysis revealed that the autophagy rhythm is ubiquitous in *** together,our findings demonstrate that the LUXmediated circadian clock regulates plant autophagy rhythms.

关键词： autophagy carbon starvation circadian clock LUX rhythm

Growth-Regulating Factors （GRFs）： A Small Transcription Factor Family with Important Functions in Plant Biology

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Molecular Plant 2015年第7期8卷 998-1010页

作者： Mohammad Amin Omidbakhshfard Sebastian Proost Ushio Fujikura bernd mueller-roeber Institute of Biochemistry and Biology University of Potsdam Karl-Liebknecht-Straβe 24-25 Haus 20 14476 Potsdam-Golm Germany Max-Planck Institute of Molecular Plant Physiology Am Muhlenberg 1 14476 Potsdam-Golm Germany

Growth-regulating factors （GRFs） are plant-specific transcription factors that were originally identified for their roles in stem and leaf development, but recent studies highlight them to be similarly important for other central developmental processes including flower and seed formation, root development, and the coordination of growth processes under adverse environmental conditions. The expression of several GRFs is controlled by microRNA miR396, and the GRF-miRNA396 regulatory module appears to be central to several of these processes. In addition, transcription factors upstream of GRFs and miR396 have been discovered, and gradually downstream target genes of GRFs are being unraveled. Here, we review the current knowledge of the biological functions performed by GRFs and survey available molecular data to illustrate how they exert their roles at the cellular level.

关键词： abiotic stress chromatin remodeling flower development growth regulation leaf development,miRNA

ORS1, an H2O2-Responsive NAC Transcription Factor, Controls Senescence in Arabidopsis thaliana

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Molecular Plant 2011年第2期4卷 346-360页

作者： Salma Balazadeh Miroslaw Kwasniewski Camila Caldana Mohammad Mehrnia Maria Ines Zanor Gang-Ping Xue bernd mueller-roeber University of Potsdam Institute of Biochemistry and Biology KarI-Liebknecht-Straβe 24-25 Haus 20 14476 Potsdam-Golm Germany Max-Planck Institute of Molecular Plant Physiology Am Muhlenberg 1 14476 Potsdam-Golm Germany University of Silesia Department of Genetics Jagiellonska 28 40-032 Katowice Poland CSIRO Plant Industry 306 Carmody Road St Lucia QLD 4067 Australia Present address: Instituto de Biologia Molecular y Celular de Rosario (IBR-CONICET). Facultad de Ciencias Bioquimicas y Farmaceuticas (UNR) Suipacha 530 Rosario S2002LRK Argentina

We report here that ORS1, a previously uncharacterized member of the NAC transcription factor family, controls leaf senescence in Arabidopsis thaliana. Overexpression of ORS1 accelerates senescence in transgenic plants, whereas its inhibition delays it. Genes acting downstream of ORS1 were identified by global expression analysis using transgenic plants producing dexamethasone-inducible ORSl-GR fusion protein. Of the 42 up-regulated genes, 30 （-70%） were pre- viously shown to be up-regulated during age-dependent senescence, We also observed that 32 （-76%） of the ORSl-dependent genes were induced by long-term （4 d）, but not short-term （6 h） salinity stress （150 mM NaCI）. Furthermore, expression of 16 and 24 genes, respectively, was induced after 1 and 5 h of treatment with hydrogen peroxide （H2O2）, a reactive oxygen species known to accumulate during salinity stress. ORS1 itself was found to be rapidly and strongly induced by H2O2 treatment in both leaves and roots. Using in vitro binding site selection, we determined the preferred binding motif of ORS1 and found it to be present in half of the ORSl-dependent genes. ORS1 is a paralog of ORE1/ ANACO92/AtNAC2, a previously reported regulator of leaf senescence. Phylogenetic footprinting revealed evolutionary conservation of the ORS1 and ORE1 promoter sequences in different Brassicaceae species, indicating strong positive selection acting on both genes. We conclude that ORS1, similarly to ORE1, triggers expression of senescence-associated genes through a regulatory network that may involve cross-talk with saltand H2O2-dependent signaling pathways.

关键词： NAC transcription factor leaf senescence gene expression gene regulatory network hydrogen peroxide

A step-by-step protocol for formaldehyde-assisted isolation of regulatory elements from Arabidopsis thaliana

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Journal of Integrative Plant Biology 2014年第6期56卷 527-538页

作者： Mohammad Amin Omidbakhshfard Flavia Vischi Winck Samuel Arvidsson Diego M.Ria?o-Pachón bernd mueller-roeber University of Potsdam Institute of Biochemistry and Biology Potsdam-Golm 14476 Germany Max-Planck Institute of Molecular Plant Physiology Potsdam-Golm 14476 Germany Brazilian Bioethanol Science and Technology Laboratory (CTBE) Brazilian Center of Research in Energy and Materials (CNPEM) Campinas Brazil

The control of gene expression by transcriptional regulators and other types of functional y relevant DNA transactions such as chromatin remodeling and replication underlie a vast spectrum of biological processes in al organisms. DNA transactions require the control ed interaction of proteins with DNA sequence motifs which are often located in nucleosome-depleted regions （NDRs） of the chromatin. Formaldehyde-assisted isolation of regulatory elements （FAIRE） has been established as an easy-to-implement method for the isolation of NDRs from a number of eukaryotic organisms, and it has been successful y employed for the discovery of new regulatory segments in genomic DNA from, for example, yeast, Drosophila, and humans. Until today, however, FAIRE has only rarely been employed in plant research and currently no detailed FAIRE protocol for plants has been published. Here, we provide a step-by-step FAIRE protocol for NDR discovery in Arabidopsis thaliana. We demonstrate that NDRs isolated from plant chromatin are readily amenable to quantitative polymerase chain reaction and next-generation sequencing. Only minor modification of the FAIRE protocol wil be needed to adapt it to other plants, thus facilitating the global inventory of regulatory regions across species.

关键词： Arabidopsis thaliana chromatin cis-regulatory elements epigenomics FAIRE-qPCR FAIRE-seq gene expression gene regulatory network transcription factor

SALT-RESPONSIVE ERF1 Is a Negative Regulatorof Grain Filling and Gibberellin-MediatedSeedling Establishment in Rice

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Molecular Plant 2014年第2期7卷 404-421页

作者： Romy Schmidt Jos H.M. Schippers Delphine Mieulet Mutsumi Watanabe Rainer Hoefgen Emmanuel Guiderdoni bernd mueller-roeber Institute of Biochemistry and Biology University of Potsdam Karl-Liebknecht-Str. 24–25 14476 Potsdam Germany Max Planck Institute of Molecular Plant Physiology Am Mühlenberg 1 14476 Potsdam Germany CIRAD UMR AGAP Avenue Agropolis 34398 Montpellier Cedex 5 France

Grain quality is an important agricultural trait that is mainly determined by grain size and ***, we characterize the role of the rice transcription factor （TF） SALT-RESPONSIVE ERF1 （SERF1） during grain develop-ment. Through genome-wide expression profiling and chromatin immunoprecipitation, we found that SERF1 directlyregulates RICE PROLAMIN-BOX BINDING FACTOR （RPBF）, a TF that functions as a positive regulator of grain filling. Lossof SERF1 enhances RPBF expression resulting in larger grains with increased starch content, while SERF1 overexpressionrepresses RPBF resulting in smaller grains. Consistently, during grain filling, starch biosynthesis genes such as GRANULE-BOUND STARCH SYNTHASEI （GBSSI）, STARCH SYNTHASEI （SSI）, SSIIla, and ADP-GLUCOSE PYROPHOSPHORYLASELARGE SUBUNIT2 （AGPL2） are up-regulated in SERF1 knockout grains. Moreover, SERF1 is a direct upstream regulator ofGBSSI. In addition, SERF1 negatively regulates germination by controlling RPBF expression, which mediates the gibberel-lic acid （GA）-induced expression of RICE AMYLASEIA （RAmylA）. Loss of SERF1 results in more rapid seedling establish-ment, while SERF1 overexpression has the opposite effect. Our study reveals that SERF1 represents a negative regulatorof grain filling and seedling establishment by timing the expression of RPBF.

关键词： RPBF rice grain filling germination SERF1 gibberellic acid

Primary carbohydrate metabolism genes participate in heat-stress memory at the shoot apical meristem of Arabidopsis thaliana

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Molecular Plant 2021年第9期14卷 1508-1524页

作者： Justyna Jadwiga Olas Federico Apelt Maria Grazia Annunziata Sheeba John Sarah Isabel Richard Saurabh Gupta Friedrich Kragler Salma Balazadeh bernd mueller-roeber University of Potsdam Institute of Biochemistry and BiologyKarl-Liebknecht-Straße 24-25Haus 2014476 PotsdamGermany Max Planck Institute of Molecular Plant Physiology Am Muehlenberg 114476 PotsdamGermany Present address:Leiden University PO Box 95002300 RA Leidenthe Netherlands

In plants, the shoot apical meristem (SAM) is essential for the growth of aboveground organs. However, little is known about its molecular responses to abiotic stresses. Here, we show that the SAM of Arabidopsis thaliana displays an autonomous heat-stress (HS) memory of a previous non-lethal HS, allowing the SAM to regain growth after exposure to an otherwise lethal HS several days later. Using RNA sequencing, we identified genes participating in establishing the SAM's HS transcriptional memory, including the stem cell (SC) regulators CLAVATA1 (CLV1) and CLV3, HEAT SHOCK PROTEIN 17.6A (HSP17.6A), and the primary carbohydrate metabolism gene FRUCTOSE-BISPHOSPHATE ALDOLASE 6 (FBA6). We demonstrate that sugar availability is essential for survival of plants at high temperature. HEAT SHOCK TRANSCRIPTION FACTOR A2 (HSFA2A) directly regulates the expression of HSP17.6A and FBA6 by binding to the heat-shock elements in their promoters, indicating that HSFA2 is required for transcriptional activation of SAM memory genes. Collectively, these findings indicate that plants have evolved a sophisticated protection mechanism to maintain SCs and, hence, their capacity to re-initiate shoot growth after stress release.

关键词： aldolase carbon metabolism heat stress shoot apical meristem thermomemory thermopriming

The LysM Receptor-Like Kinase LysM RLK1 Is Required to Activate Defense and Abiotic-Stress Responses Induced by Overexpression of Fungal Chitinases in Arabidopsis Plants

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Molecular Plant 2012年第5期5卷 1113-1124页

作者： Yariv Brotman Udi Landau Smadar Pnini Jan Lisec Salma Balazadeh bernd mueller-roeber Aviah Zilberstein Lothar Willmitzer Ilan Chet Ada Viterbo Genes and Small Molecules AG Willmitzer Max-Planck-lnstitut of Molecular Plant Physiology Am Muhlenberg 1 D-14476 Potsdam-Golm Germany Department of Plant Pathology and Microbiology The Smith Faculty of Agriculture Food and Environment The Hebrew University of Jerusalem Rehovot 76100 Israel Department of Plant Science Tel Aviv University Tel Aviv 69978 Israel University of Potsdam Institute of Biochemistry and Biology KarI-Liebknecht-Strae 24-25 Haus 20 14476 Potsdam-Golrn Germany

Application of crab shell chitin or pentamer chitin oligosaccharide to Arabidopsis seedlings increased toler- ance to salinity in wild-type but not in knockout mutants of the LysM Receptor-Like Kinasel （CERK1/LysM RLK1） gene, known to play a critical role in signaling defense responses induced by exogenous chitin. Arabidopsis plants overexpress- ing the endochitinase chit36 and hexoaminidase excyl genes from the fungus Trichoderma asperelleoides T203 showed increased tolerance to salinity, heavy-metal stresses, and Botrytis cinerea infection. Resistant lines, overexpressing fungal chitinases at different levels, were outcrossed to lysm rlkl mutants. Independent homozygous hybrids lost resistance to biotic and abiotic stresses, despite enhanced chitinase activity. Expression analysis of 270 stress-related genes, including those induced by reactive oxygen species （ROS） and chitin, revealed constant up-regulation （at least twofold） of 10 genes in the chitinase-overexpressing line and an additional 76 salt-induced genes whose expression was not elevated in the lysm rlkl knockout mutant or the hybrids harboring the mutation. These findings elucidate that chitin-induced signaling mediated by LysM RLK1 receptor is not limited to biotic stress response but also encompasses abiotic-stress signaling and can be conveyed by ectopic expression of chitinases in plants.

关键词： abiotic stress chitin-induced signaling chitinases LysM receptor kinase Trichoderma.